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    • Changes in biologically-active ultraviolet radiation reaching the Earth's surface 

      McKenzie, Richard L; Aucamp, Pieter J.; Bais, Alkiviadis F.; Björn, Lars Olof; Ilyas, Mohammad (The Royal Society of Chemistry & Owner Societies, 2007)
      The Montreal Protocol is working. Concentrations of major ozone-depleting substances in the atmosphere are now decreasing, and the decline in total column amounts seen in the 1980s and 1990s at mid-latitudes has not ...